EuroVelo 4 - Central Europe Route - part Poland: which way and when to ride
The best month for EuroVelo 4 - Central Europe Route - part Poland is September: 75% of days were dry with highs of 10–30 °C. In September the wind barely favours either direction — on average 1.9 km/h along the route (ERA5 2006–2025, daytime 9:00–18:00).
Weather by month
| Month | Good days | Rain days ≥ 1 mm | Rain, mm | Avg high | Days ≥ 30 °C | Days < 10 °C | Daylight, h |
|---|---|---|---|---|---|---|---|
| January | 4% | 25% | 54 | 2 °C | 0% | 95% | 8.5 † |
| February | 11% | 23% | 50 | 4 °C | 0% | 87% | 10.0 † |
| March | 36% | 23% | 52 | 9 °C | 0% | 58% | 11.7 |
| April | 65% | 25% | 56 | 15 °C | 0% | 21% | 13.7 |
| May | 65% | 34% | 96 | 19 °C | 0% | 3% | 15.4 |
| June | 63% | 31% | 86 | 23 °C | 6% | 0% | 16.3 |
| July | 58% | 31% | 99 | 25 °C | 13% | 0% | 15.9 |
| August | 62% | 27% | 88 | 25 °C | 13% | 0% | 14.4 |
| September | 75% | 23% | 85 | 20 °C | 2% | 1% | 12.5 |
| October | 69% | 18% | 62 | 14 °C | 0% | 20% | 10.6 † |
| November | 33% | 21% | 54 | 8 °C | 0% | 61% | 8.9 † |
| December | 6% | 19% | 46 | 4 °C | 0% | 94% | 8.1 † |
Best months are all months within 3 percentage points of the best one. † less than 11 hours of daylight — long stages get tight.
Wind by month
| Month | Wind Bestwinka → Jodłówka-Wałki, km/h | Headwind > 15 km/h, Bestwinka → Jodłówka-Wałki | Headwind > 15 km/h, Jodłówka-Wałki → Bestwinka | Better way |
|---|---|---|---|---|
| January | +5.1 | 3% | 20% | Bestwinka → Jodłówka-Wałki |
| February | +4.2 | 3% | 18% | Bestwinka → Jodłówka-Wałki |
| March | +3.6 | 5% | 18% | Bestwinka → Jodłówka-Wałki |
| April | +2.0 | 4% | 12% | Bestwinka → Jodłówka-Wałki |
| May | +0.9 | 4% | 9% | either |
| June | +1.8 | 2% | 9% | either |
| July | +4.3 | 1% | 12% | Bestwinka → Jodłówka-Wałki |
| August | +2.2 | 2% | 7% | Bestwinka → Jodłówka-Wałki |
| September | +1.9 | 4% | 10% | either |
| October | +3.0 | 3% | 12% | Bestwinka → Jodłówka-Wałki |
| November | +3.2 | 2% | 14% | Bestwinka → Jodłówka-Wałki |
| December | +5.4 | 2% | 18% | Bestwinka → Jodłówka-Wałki |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–18 | NE | +0.5 |
| 18–43 | E | +2.2 |
| 43–68 | E | +2.4 |
| 68–94 | NE | +1.6 |
| 94–113 | E | +2.1 |
| 113–141 | E | +1.9 |
| 141–166 | E | +2.3 |
| 166–191 | E | +1.9 |
| 191–211 | E | +1.7 |
How to read the numbers
Wind is the 10 m wind of a 25-km grid cell, daytime hours 9:00–18:00 local solar time; at saddle height in a sheltered valley it is weaker, on a coast or ridge stronger. A positive value is a tailwind. ERA5 slightly over-counts days with ≥ 1 mm of rain (by about 5–7 percentage points) and underestimates daily highs by 1–2 °C. Good day = less than 1 mm of rain between 9:00 and 18:00 (riding hours, local solar time) and a high between 10 and 30 °C; rain at night or in the evening does not spoil it.